Soldering iron



FIG. 1 is a perspective view of a soldering iron showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a perspective view of the soldering iron where for ease of illustration a button is separated from the soldering iron;

FIG. 10 is an enlarged view of portion 10 shown in FIG 1;

FIG. 11 is an enlarged view of FIG. 5; and,

FIG. 12 is an enlarged view of FIG. 6.

The broken lines in the drawings depict portions of the soldering iron that form no part of the claimed design. 

CLAIM The ornamental design for a soldering iron, as shown and described. 